Carriage for motors



Feh 3, 11942 A. w. MALL 2,271,944

CARRIAGE FOR MOTORS Filed April 25, 1940 2 Sheets-Sheet J.

INVENTUR BY ATTDRNEY Feb. 3, 1942. A. w. MALL 2,271,944

CARRIAGE FOR MOTORS Filed April 25, 1940 2 Sheets-Sheet 2 lNVENTUR BYATTEIRNEY Patented Feb. 3, 1 942 UNITED STATES PATENT ,oeF--1c.E

CARRIAGE FOR MOTORS. Arthur William Mall, Fn smeogm; Application April25, 1940, Serial No. 331.512 1 Claim. (01. 280- 35) My invention relatesto a motor and carriage for motors assembly of the portable type usedprincipally for grinding operations. I

One object of the invention is to provide a motor mounting which willnot interfere with the body of the operator when he is carrying themachine about.

Another object is to provide the motor mounting with legs having alimited resiliency in proportion to the over-all weight of the machine.

A further object is to provide a mounting for the motor which will causethe machine to tagalong readily after the operator.

A still further object is to provide a low center of gravity for themachine whereby tipping is prevented.

Other objects and advantages of the invention will be apparent uponreading the specification and claim, and upon examination of thedrawings in which:

Fig. 1 is a side elevation of the motor and motor mounting;

Fig. 2 is a plan view of the same; and

Fig 3 is a side elevation view of the support legs alone.

In the preferred embodiment of my invention I have provided amotor-housing I having an electric motor therein. I have shown agearedhead type of motor in which a train of gears is enclosed in thegear housing 2 for increasing the speed. of the drive shaft 3, however,it is to be understood that any type of electric motor may be used and Ido not wish to be limited to the type shown.

Formed integrally with the exterior wall of the :7

' 4 is a boss 5 also formed integrally with the exterior wall of themotor housing. A carrying handle 6 is secured to boss 5 by means of abolt 1. The handle 6 is located substantially centrally of the over-allmass of the machine so that the machine is balanced when being carriedby the operator. An arm 8 preferably integral with'the motor housing Isupports the switch box 9 which has a control lever II] for turning theswitch on and 01T.

The supporting legs l2, l3 and Mare formed of continuous strips ofchannel steel and'each leg has two bends throughout its longitudinallength thereby providing each leg with a horizontally extending portionl5, an upwardly extending portion l6 and a second horizontally extendingportion IT. The leg l2 isprovided at its which serves as a bumper guard.It can be seen that a recession is defined by the upwardly extendingportions l6 of the legs. By mounting the motor within thisrecession, Ihave made it possible to lower the center'of gravity of the en- .tiremachine to a point closely adjacent the floor level, thereby assuringthat the machinewill not tip over when in use.

By bending the legs in the manner shown I have not only made it possibleto lower the center of gravity of the machine, but I have also imparteda limited resiliency to the legs.- The resiliency of the legs is in anup and down direction and whenever the machine is dropped by theoperator the legs serve as shock absorbers and minimize injuriousconsequences. The legs, however. are not so resilient that the motorwill strike the fioor when dropped.- The legs have sufiicient loadstrength to support the Weight of an average man in addition to themotor.

When the machine is in use, a flexible shaft (not shown) is driven bythe drive shaft 3 and a tool attachment is secured to the free end ofthe flexible shaft.

At the free end of each leg I have provided universal swivelling casters22 23 and 24. By using this type of caster in' combination with thethree-legged supports, I have provided a machine which will readily tagalong after the operator whenever he pulls on the flexible shaft. Tofacilitate this tag along feature of the machine I have made the leg l2longer than the legs l3 and", By making the leg I2 longer than the'othertwo legs the machine responds more readily to sidewise pulls. This isdue to the caster 22 serving somewhat as a pivot while the other twocasters are moving sidewise in the direction of the pull. The inner endsof each of the legs I2, l3 and M are welded to a steel ring 20 which issecured to the boss 4 by means of the bolt 2|.

vided a simple and inexpensive method of se- By locating the leg, 12 inlongitudinal alignment with-the motor housingI have assured that in the.rear region of said housing there are no projections extending laterallybeyond the side walls of the motor housing. Thus, when the opouter endwith a vertically extending portion I8 55 erator picks up the machine bythe handle 6,

Thus it can be seenthat I have prothe smooth round surface of the sidewall of the motor housing is the only part of the machine which restsagainst the operators body. This feature facilitates the portability ofthe machine, because, when the machine is resting against the body ofthe operator, the burden of carrying the machine is reduced. If themachine were constructed so as to be uncomfortable when resting againstthe operator's body, then he would be forced to hold the machine awayfrom his body and allow his arm alone to carry the total burden of theweight of the machine,

Having thus described my invention what I claim is:

A carriage for a motor comprising, a locating disc, three separate straplegs, each having an end secured to the locating disc, one leg extendingoutwardly from said disc in longitudinal alignment with the axis of themotor, the other two legs extending outwardly from said disc in anangular direction relative to the axis of the motor, each of said legshaving a portion extending normally horizontally, each leg being bent ata predetermined location to form a normally upwardly extending portion,each leg also being bent at a second predetermined location to formanother horizontally extending portion, said disc providing a centrallylocated point for supporting substantially the entire gravity load ofthe motor, an arm secured to the longitudinally aligned leg and alsodetachably secured to the non-working end of the motor to help supportthe gravity load of the motor, said angularly extending legs defining aspace into which the Working end of the motor protrudes, and surfaceengaging means secured to the free ends of the legs.

ARTHUR WILLIAM MALL.

